Comb in combing machines



July 10, 1928. v 1,676,702

. J. w, NASMITH COMB IN COMBING MACHINES Filed March 10, 1926 I Invenl'azw- .B Hisflllorne 4 I 1" Patented July 19, 1928,

entree srrs PATENT FicE.

JOHN WILLIAM NASMITH, OF MANCHESTER, ENGLAND.

COMB IN COM'EING MACHINES.

Application filed March 10, 1926, Serial No. 93,640, and in Great Britain March 17, 1925.

understood. The object of the improvements is to provide needles of a lesser number per unit length of comb than hitherto provided thus allowing of stronger needles being used, with a lesser number of points to engage with the lap or fleece or the like not impairing in any way the efiiciency of the comb. The latter is thus adapted to deal adequately with heavy work, a desideratum in up-to-date apparatus with a high rate of production.

Hitherto the comb needles of a top comb in a cotton combing machine have in one form been made conical throughout, and r the effective fibre cleaning space is only that i space between needles which is adjacent to the lower edge of the comb blade, that is to I say, at the narrowest point of the said space between needles and into which the lap is pulled at the beginning of the detaching operation, in a cotton comber whilst the necessary large number'of points per inch offer much resistance to the entry of the lap especially when the short fibre is being combed. The needles of such a comb are necessarily fragile when large quantities of fibre have to be dealt with.

To strengthen the needles, they have also hitherto been made with adjacent sides flattened, but a flattened surface is not so efficient for the purpose as the surface of a cylinder or cone, and strength in this form of needle is gained at the expense of ethciency. Further, as the needles have necessarily to lie-attached to the comb blade with their-longer transverse axes parallel to the path of the fibres, eflicient fitting of the needles presents a difliculty.

According tov my present improvements I form a comb with a plurality of needles which are parallel to each other and each of which is cylindrical for a part of its of fibres as a natural consequence, whilst,

upper portion 0 of each needle being in the form of a cylinder, whilst the lower portion d tapers off in conical form. By this construction there is a largeaggregate area per unit length of; comb between the conical portion at for easy entrance into the lap or fleece of fibres, and the cylindrical portions 7 of the needles being-parallel the whole of the space (2 between any two adjacent needles is effective cleaning space for the fibres. vVith approximately thirty needles of the type shown in the drawing per inch of blade in atop comb, the effective cleaning space of the said comb is equal to that of acomb with needles wholly conical in form, fitted seventy to the inch and of a. greater length in proportion to their mean diameters-than the needles shown in the I drawing. That is to say, there is more room left per inch length of blade which. may be occupied by needle material, allow ing for the fitting of stronger needles, this added strength permitting the use of longer needles whilst the spaces between the conical ends of theneedles madefaccording to these improvements allow easy'entrance of the lap or fleece, there being fewer points to resist the said entrance of. the lapor fleece. Further, thecylindrical form of the portion 0 of a needle facilitates attachment of the said needle to the comb blade I), by

the usual soldering or like methods.

A convenient space 6 between the cylindrical portions of'two adjacent vneedles is two one-thousandths of an inch.

I claim z- 1. A comb for a combing machine, comprising a blade, and a series of combing teeth secured against one side of the blade and having straight cylindrical combing portions spaced apart and arranged parallel to each other, and projecting below the cured against one side of the blade, and

having their lower cylindrical combing portions and conical pointed ends projecting below the edge of theblade.

In testimony whereof I have my hand.

hereunto set JOHN WILLIAM NASMITH. 

